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overdrive

noun [U]
 
 
/ˈəʊ.və.draɪv/ US  /ˈoʊ.vɚ-/

Definition

a state of great activity, effort, or hard work: The official propaganda machine went into overdrive when war broke out. The cast were in overdrive, rehearsing for the first performance.Busy and activeHurrying and doing things quickly
(Definition of overdrive noun from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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